Description

Master Your Molds: Ultimate Liquid Polyurethane for GRC

Engineered for mold makers, GRC factories, and professional designers seeking precision + durability.

Polyurethane Mold Rubbers are good for GRC mold making, it’s specially formulated as elastomeric material for preparing negative moulds in precast or in-situ concrete industries. Mostly used for making architectural GRC (glass reinforced concrete) elements include panels, columns heads and other elements.  It consists of two parts(A&B), which after mixing, cure at room temperature to flexible, high-strength, mold rubbers.The cured material provides very high elastomeric property with sufficient hardness.

Why Professionals Choose Our Polyurethane Rubber

✅ 8-28X Longer Mold Life
Outlasts conventional materials with superior abrasion/tear resistance. Ideal for high-volume GRC and concrete production.
✅ Flawless Detail Capture
Liquid formula flows effortlessly into intricate patterns, eliminating air bubbles for perfect surface reproduction.
✅ Production-Optimized Efficiency

Easy Mixing: Precise 2-part system (A+B)

Fast Cure: Room-temperature setting (6-12 hrs typical)

Zero Special Equipment: Saves energy & costs

Urethane Rubber vs. Silicone rubber: Performance Comparison

Technical Specifications of JH liquid polyurethane rubber

5-Step Application Guide of Urethane Rubber for Making Molds

1.Prepare
Clean master pattern & apply release agent.

2.Mix
Precisely blend Parts A+B (scrape container sides).

3.Pour
Slow pour from lowest point → bubble-free fill.

4.Cure
Rest undisturbed at room temperature.

5.Demold
Remove cured mold gently.

Economic Advantages

 Mold Replacements: Durable molds = lower material/labor costs

 Productivity: Faster curing = reduced downtime

Quality: Fewer rejected castings & material waste

Ideal for: Veneer stone, stamped concrete, GFRC, and artificial stone production.

Specialized Solutions

GFRC Mold Making

Veneer Stone Molds

Stamped Concrete Systems

Sustainable Manufacturing

We prioritize:
♻️ Reduced energy consumption
♻️ Minimal production waste

Partner With Us: Leverage 40+ years of expertise in high-performance polyurethane mold rubber for GRC, concrete, and architectural elements.

“Redefined our mold lifespan and ROI – 22X more castings than silicone.”
– GRC Factory Manager

Transform your production: Achieve precision, durability, and cost-efficiency with industry-leading polyurethane solutions.

Storage:

Store in a cool and dry place. If you can’t use one drum up at a time,  please inject N2. The storage time of the original packing is 6 months.

Warm Tips:

To ensure dimensional accuracy and maximum life period, moulds made of JH polyurethane rubber are preferably stored in their supporting mould under air admittance. Prolonged compression may lead to irreversible deformation. The moulds must be protected against UV irradiation and direct insolation.